Grinding-pan



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15. HINKLE.

- v GRINDING PAN. No. 400,681. Patented Apr. 2, 1889.

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P. HINKLE.. GRINDING PAN. Noy400g681'. Patented Apr. 2, 1889.

N4 Pains, mwmognphur. wumngm me UNITED STATES PATENT OFFICE.

PHILIP HINKLE, OF vSAN FRANCISCO, CALIFORNIA.

GRINDING-PAN.

SPECIFICATION forming part of Lett-ers Patent No. 400,681, dated April 2, 1889.

Application filed November 16, 1888. Serial No. 291,036. (No model.)

To all whom it may concern,.-

Be it known that I, PHILIP HINKLE, of the city and county of San Francisco, State of California, have invented an Improvement in Grinding-Pans; and l hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to certain improvements in grinding-pans; and it consists in fcertain details of construction, which will be Y more fully explained by reference to the accompanying drawings, in whichi Figure 1 is a vertical section` taken centrally across the pan. Fig. 2 is a plan view with the top of the pan removed, showing part of the revolving grinding-rollers also removed. Fig. 3 is a vertical section through one of the rollers and one of the lifting-plates. Fig. 4 is a detail view of the bottom of one of the rollers, showing the manner of fastening the ringshoes on saine.

A is the pan-bottom, which is preferably cast with low flaring sides B, within which is fitted a similarly-shaped flaring ring-die, C,

which is fixed into place by calking between Y it and the sides of the pan, as shown at D. The inner portion of the bottoml is made concave from below, and in the center is a conicallyshaped hollow sleeve or casing, E, through which the vertical driving-shaft F extends. To the lower end of -this shaft is secured the bevel-gear G, and this gear is set well up into the concavity of the bottom of the pan, which enables me to set the pan much lower than would otherwise be the case.

H is a beveled driving gear-wheel fixed to a horizontal shaft,l, and this gear engages with the gear G and drives the vertical shaft. To the upper end of this shaft is fixed a carrier, J, which extends down outside the hollow shaft-casing E, and is thence inclined outwardly, so as to correspond with the inclined bottom of the pan. Theinclination of the upper surface of the pan-bottom and of this carrier is such that they stand at right angles with the sides of the pan-bottom and with the 'face of the ring-die O, which is fixed around its periphery. The carrier J has radial slots K formed in it, which act as guides for the slides L, which are litted into these slots so as to move to or from the center, as required. These slides serve to support the shafts M, which are fixed in them, and extend upwardly at right angles with the slides and with the inclined bottom of the pan.

Upon the tops of the guides are fixed wroughtiron or steel plates K',v which steady the slides L and hold them in place, and also prevent them from being clogged.

Upon the shafts M are fitted the grindingrollers O, so as to turn upon the shafts. These rollers have ring-shoes P fixed upon their peripheries, being calked, as described, for the dies within the pan. The faces of these rollers and their shoes stand parallel with the inner face of the ring-die C, .so that when they are driven around by the movement of the carrier J they will roll' against the die G. These slides L, traveling in the radial guides K, allow the rollers to move to and from the center, and thus accommodate themselves to the character and quantity of the material which may lie between them and the die C, where the grinding or pulverizing takes place.

The lower edges of the rings or shoes P are fitted to the bottoms of the rollers O by the dovetailed slots and keys, as shown at Q,

Fig. 4. This serves to keep them in place.

ers will be considerably relieved from friction and the bottom of the rollers kept out of contact with the surface beneath.

Upon the upper end of each of the rollershafts is fitted a washer, V, and the upper ends of the shaft being screw-threaded the nut W screws down upon this washer. The central portion of each of the rollers O is extended upward in the form of a sleeve, which surroundsv the shaft, on the upper end of which the washer V rests and against which IOO the sleeve turns. This prevents the roller from being forced upward on this shaft by its movement in traveling around in contact with the die C within the pan.

When it is necessary to remove the rollers for any purpose, it is done by unscrewing the nut IV, and by means of the rings or handles shown at X the rollers may be lifted olf their shafts when the top of the pan and the conro necting parts have been removed.

. Around the upper partof the carrier J is fitted a tank. or reservoir, Y, into which clear water is led through the pipes Z. From the lower part of this reservoir inclined tubes d extend outwardly toward the upper end of each of the roller-shafts M. These shafts M are made hollow, and conduits b have their outer ends bent so as to enter the upper ends of these shafts, into which they are fitted.

2o The inner ends of these conduits slide telescopically within the pipes d, and this sliding` allows them to adjust themselves to the radial movements of the rollers as they rotate around the pan. Through these pipes and 2 5 conduits d b and through the hollow shaft M Water passes from the reservoir, and passing below the slides L it serves to wash out any grit or dirtand to act as a lubricant, so that these parts will move easily upon each other. 3o The lower ends of the slides fit closely around the carrier; but the inner partis raised a little, so that the water can flow toward the center beneath the slide, and it returns to the outer end through slots K2, made on top of 3 5 the slides and beneath the plates K', as shown in Fig. 3. Other conduits, c, extend from the bottom of the reservoir down inside of the vertical port-ion of the carrier J and between it and t-he shaft-casing, which stands up in 4o the center of the pan, and the water passes through these conduits down around the shaft-casing E and beneath the bottom of the carrier J, between it and the inclined bottom of the pan, and flowing constantly outward prevents any accumulation of the material,

which would cause undue friction or prevent the free motion of the carrier.

The pan is supported upon the hollow legs d, which are secured to it by bolts e, the legs 5o being removable, so as to reduce the whole to a small compass for transportation. The top f of the pan is formed with fianges, so they may be bolted upon the corresponding lian ges at the top of the inclined sides of the pan- 5 5 bottom, as shown plainly in Fig. l, and a tight joint is made by means of a rubber or other packing-ring, as shown at g.

7L is the feed-opening by which the charge is introduced into the pan.

i is a series of inclined steel plates which are fixed to the outer edges of the carrier J, and they travel along upon the bottom of the pan between the rollers, so that when the car rier is rotating and t-he rollers traveling 6 5 around in contact with the ring-die C on the interior of the pan these pla-tes, moving over the bottom of the pan, lift up any material which may be settled there, and discharging it in an upwardly-inclined direction from the rear end of the plates t it passes directly between the following roller andthe die at a point about midway between the top and bottom of the periphery of the roller, so that the material is constantly lifted up into position to be ground or pulverized between the rollers and the die. W hen the material is sufficiently pulverized, it is discharged through asuitable screen, j, and is conveyed into the inclined sluices 7c, with amalgamated plates in the bottom, upon which to save fine gold or amalgam. From these sluices the material is delivered into a shaking concentrator, m, supported upon spring-arms n, and caused to oscillate by means of rods 0 from eccentrics or cranks p on the shaft I, so as to work in unison with the pan.

.W'henever the ring-shoes upon the rollers become worn, so as to be materially lighter, I compensate this by placing supplemental weights r upon the tops of the rollers, the weights having central holes, so as to fit around the upwardly-exten ding central portion of the rollers.

This construction also enables me to make a low compact pan which is easily separated into comparatively small portions for shipment. l

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a grinding-pan, the inclined bottom, the outwardly-inclined sides, with the correspondingly-shaped ring-die fixed therein by calking, the carrier or driver, the bottom of which is inclined to correspond with the botf tom of the pan, and having the radial guideslots, in combination with guides fitted in said slots, the top plates, the upwardly-extending shafts ixed in said guides so as to extend at an inclination. outwardly, and the rollers turning upon said shafts, with their peri pheries traveling in contact with the ringdie, substantially as herein described.

2. A grinding-pan having the inclined bottom and sides, the correspondingly-inclined die, the rotary carrier having radial slots in its outer periphery, with top plates and guides movable in said slots, said guides having upwardly-projecting cones or hubs, and the inclined shafts M, fixed in said cones or hubs, in combination with rollers fitting said shafts, having upwardly-extending sleeves from the top, and concavities in the bottom fitting the conical hubs of the guides, and the anti-frictional rings T and U, the holding nut and washer at the top of the shaft, Asubstantially as herein described.

3.' In a grinding-pan, the inclined bottom and sides, the correspondingly-inclined rollers, the inclined shafts, and the radially-moving guides, in combination with a central rotat ing reservoir, and pipes connecting said reser- IOO IIO

voir with the upper ends of the shafts, so as to l Y discharge waterj through them and beneath the rollers and guides, substantially as herein described. Y

4. In a grinding-pan, the `inclined bottom Y and sides, the radially-moving guides, the inclined shafts, the grinding-rollers journaled at the corresponding inclination upon said shafts, the conduits, and pipes, whereby water Witnesses:

S. H. NoURsE, AH. C. LEE. 

